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Reflection and scattering of acoustic rays computed for parabolic ice keel models


Published 1988
Topics Ice, Sound-waves
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"April 1988."

Bibliography: p. 17

Coefficients are computed for ray reflection and scattering from a model of a set of keels. The model is a collection of parallel ice keels that are of parabolic cross section. The size of the keels and the spacing between them are drawn from random distributions. The keels are also widened by a random factor to simulate oblique incidence on nonparallel keels. Rays are permitted to reflect from and refract through keels according to the interface properties between fluids and elastic solids. A large number of rays are directed toward the keel model and, upon emergence, are sorted into angular bins to determine scattering strength versus direction. Scattering coefficients have a dominant lobe near the secular direction. This is shown to result from the shape of the curve of reflection versus grazing angle. Very little backscatter occurs, a result of the limited slope angle of the parabolic keel models. Keywords: Arctic acoustics; Acoustic propagation; Ray theory; Sea ice; Reflection coefficients; Scattering coefficients; Ice keels


Publisher Ft. Belvoir : Defense Technical Information Center
Pages 32
Language English
Call number ocn550618755
Digitizing sponsor Boston Library Consortium Member Libraries
Book contributor MBLWHOI Library
Collection biodiversity; MBLWHOI; blc; americana

Full catalog record MARCXML

[Biodiversity Heritage Library icon]This book is available with additional data at Biodiversity Heritage Library.


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